Eliphaz asks this question to say that no one who sees a friend suffering can remain silent. AT: "No one can restrain himself from speaking (to a friend in such a state as you find yourself)" or "I must speak to you, (seeing that you are in a state of grief)." (See: [[rc://en/ta/man/translate/figs-rquestion]])
Here "weak hands" represents people who need help. AT: "you have helped others when they needed help" (See: [[rc://en/ta/man/translate/figs-metonymy]])